5900 Di SL Pro, Everything I Know About It And The Many Things I Do Not.

[Old Penny]

New to the forum.

5900 Di SL Pro black:

What I know:   Operates at roughly 6.5 kHz; Has reliable/powerful "manual" Ground Balancing;  Is easy to adjust and trust (If you take the time to learn the ins and outs); Likes to swing and loves to send its signal deep;  Can discriminate and eliminate with the best of detectors.

What I do not know: Date of manufacture and how many years they made the 5900 Di SL Pro (Black), What the Di means, What the SL means.

So, my questions are for those that know are, 1) what is the date of manufacture and how many years they made the 5900 Di SL Pro (Black)?;  2) What does the Di in the name mean?  3) What is the SL technology that set it apart from the original 6000 DB Coin master from the 70's?

Thank you in advance, 

Old Penny"

PS. After some research, I believe the "D" deals with the ability to discriminate.  That opens the question about DB and still leaves the Di question somewhat unanswered. I've ventured thoughts and opinions on what the "SL" might signify, but would love to hear from the more knowledgeable members.

Again, thank you in advance, 

Old Penny

[Coinboy]

I don’t know the other stuff, but DI means it has discrimination.

[Steve Herschbach]

Di = Discrimination

SL = Slim Line (smaller box than older models)

White's 5900/Di Pro SL Instruction Manual

[Old Penny]

Steve!!!!!!!!!!

Thank you for your response and for the manual.

Life is an adventure, 

Enjoy Life.

If ye seek, ye shall find.